Graphophone clock



Dec. 16, 1930. J HOLLOWAY 1,785,121

GRAPHOPHONE CLOCK Filed Dec. 12, 1927 2 Sheets-Sheet l INVENTOR. v Jahwh. fiauow/m ATTORNEYS.

J. H. HOLLOWAY 1,785,121

GRAPHOPHONE CLOCK Dec. 16, 1930.

Filed Dec. 12 1927 Q 2 Sheets-Sheet 2 a A TTORNEYJ.

Patented ea. 16, 19a

entree/ era-res.

JOHN E. EOLLQWAY, OF LA FAYETTE, INDIANA G-MPEOPEONE CLOCK ApplicationfiledDeeember 12, 1927. Serial No. 239,496.

This invention relates to an electrically actuated clock andparticularly the electric motor thereof.

The chief object of the invention is to provide an electric motorsuitable for adaptation or incorporation in a clock of conventionaldesign for main spring replacement, which motor operates with verylittle current, in fact, such a small amount that the load does notregister upon meters now in commercial use if the motor be the sole loadconnected to the line.

Another object of the invention is to produce a clock which is adaptedto audiblyinl5 dicate the time division such as the hours and halfhours, and thru means which are capable of amplification if and whendesired.

The chief feature of the invention consists in the accomplishment of theforegoing objects thru a clock construction including means foroperating the same.

The chief feature of the motor consists in providing a rotatable diskpositionable between electromagnetic poles in such a manner that themagnetic flux or lines of force therefrom pass thru the disk and inducea magnetic field producing torque and causing the disk to rotate, and'inbrief the device may be defined as a split phase induction disk typeelectric motor. r

The full nature of the invention will be understood from theaccompanying drawings and the following description andclaims:

In the drawings Fig. 1 is a frontelevational view of a clock ofconventional design with the motor applied thereto. Fig. 2 is a sideelevational View thereof. Fig. 3 is a plan view taken in the plane ofthe broken line 33 of Fig. 2 and in the direction of the arrows. Fig. 4is a wiring diagram of connections. Fig. 5 is a side elevational view ofa modified form of the invention showing,

the auditory time indicating attachment.

Fig. 6 is a front elevation of thesame. Fig.

7 is a side elevation of a modified-form of auditory reproducer.

The clock mechanism illustrated herein consists of the usual frameworkcomprising the bracket 26 (see Fig. 1).

the front plate 10 and rear plate 11 with the spacing connections 12.Shaft '13 mounts a pinion 14c meshing with gear 15 upon shaft 16, whichalso supports a pinion 17 meshing with gear 18 that is mounted upon theminute hand shaft 19, the minute hand 20 being mounted upon the extendedend of said shaft.

The hour hand 21 is mounted upon a sleeve 22 which mounts a gear 23meshing with a pinion 24 carried by shaft 25 supported in Shaft 25carries gear 27 which meshes with gear 28 carried by the minute handshaft, the gear. reduction being such that the hour hand rotates onehour division for every revolution of the minute hand.

The control or escapment mechanism of the clock consists of a inion 128meshing with gear'18 upon the minute, hand shaft 19, said pinion beingmounted. upon a shaft 29 which carries gear 30 meshing with the pinion31 carried by the shaft 32. Upon the extended end of shaft32 is a gear33 and a bracket 34: supportsth'eextendedendofsaidshaft. Gear 33 mesheswith pinion 35 on shaft 36 mounted 7 in bracket 37 and said shaftsupports the escapementwheel 38associatedwithwhich is the escapementlever 39 cooperating with the balance wheel 40 on shaft 41, the lever 42regulat-' ing the clock escapement movement. All of the foregoing is arather sketchy description of enough of the essential parts of astandard clock mechanism to understand the same.

/ The motor fordriving shaft 13 instead of a main springmechanism,consists of a thin metallic disk 43 mounted upon the projecting end'ofshaft 13 at 44. The thin projecting disk 43 passes between a pair ofmagnets which are axially ofiset relative to each other.

The relationship is such that the magnetic flux or lines of force whichpass from one magnetic pole to the other pass thru the disk and byreason of the angular direction of the flux and the eddy currentsinduced in the disk, there is set up amagnetic field which producestorque and causes the disk to rotate.

The displacement of the magnetic poles is such that the magnetic flux ofone is acted upon by the magnetic flux produced by the eddy currents ofthe other and in the disk and this produces torque which causes the diskI from the pole faces 48 and 50 of the latter U-shaped magnet. Upon thearms of the U- shaped magnet 45 are a pair of coils 51 andupon the armsof the U-shaped magnet 46 are the coils 52. The disk 43 is included inboth electro-magnet circuits and completed the electromagnetic circuits;The coils 52 are connected in series by the jumper 53. One terminal ofone of the coils 52 is connected by the line 54 to L1 and the otherterminal being connected to L-2 by line Coils 51 are connected inmultiple instead of in series, the lines 56 from each being connectedtogether and the lines 57 from each being connected together. The commonlines 56 are connected by line 58. Condenser 59 is connected by line 60to the supply line L1, while the supply main L-2 is connected to thecommon lines 57 by the line 61. The series connected coils 52 are highlyinductive and, therefore, the current lags behind the voltage. The othercoils, which are connected in multiple, are not as highly inductive andby reason of the multiple connection and also the interpositioning of acondenser, the current. wave precedes the voltage wave and the re sultis a displacement of flux maximums from the normal condition or voltagerelation, the series coil flux lagging and the multiple coil fluxadvancing. The constants of each circuit can be arranged to secure anypredetermined phase relationship. The result, therefore, is an inductiontype motor having a disk rotor and which is operable upon thesplit-phase, the principal operation being as before described. As theflux passes thru the disk from one electromagnetic pole to the other ofthe same U-shaped magnet, it also sweeps along parallel to the disk andcutting the disk, thereby inducing eddy currents in said disk.

Each electromagnet construction is similarly acting but acts atdifferent times by reason of the split-phase relationship. Furthermore,the polarity of the opposed poles, that is, those which are slightlyoffset, is such that the magnetic flux of one is influenced by themagnetic flux of the other produced by the eddy currents in the disc andthere thereby resultscertain magnetic flux of the correct polarity andoccurring at the correct instant.

While in the present invention U-shaped magnets are illustrated, thesimplest form of the invention includes but a single or bar magnet, thepole faces being offset substantially the width of a pole piece. The U-shaped magnet arrangement merely multiples the efliciency and securesgreater torque for the same amount of current. The energy consumed bythe device such as herein illustrated, is less than four watts per hourwhich as is well known, is less than the present household commercialmeters are prepared to register. Of course, if a registrable load isincluded in the meter circuit, the clock motor load is added thereto andwill be registered.

A base 62 is substantially angular and the arm 63 is secured at 64 tothe front plate 10 of the clock. The base 62 supports a condensor 59 atas 65, one terminal being shown at 66. The U-shaped magnets 45 and 46are comprised of laminations secured together and mounted in spacedrelation upon the base 62 asv at 67. Also supported thereby is aterminal block 68 supporting the terminals L-l and L-2 and supportedupon the U- shaped keeper 46 by the brackets 69.

In Figs. 5, 6 and 7 there is illustrated a modification of the clockmechanism. The same includes the main front plate 110, and the hour handshaft 122 is extended from the plate and mounts a phonograph disk 150. Aspiral spring 151 has one end connected to said disk at 152 and theinner end connected to the shaft as at 158. The disk 150 upon its frontface has a groove 154 which includes vibration producing variationscorresponding to v ocal designation of the hour and half hour.Twenty-four pins or stops 155 project rearwardly from the plate and formtwentyfour half hour divisions. Pivotally supported in the bracket orears 156 at 157 is a bellcrank 158 normally retained in position by aspring 159 secured to a member 160 carried by plate 110. The stopportion 161 of the bellcrank 158 limits clockwise movement (see Fig. 5)on pivot 157. In the rotation of hour hand shaft 122 the spring 151 iswound up until its tension is sufiicient to overcome spring 159. Whenthis occurs the disk 150 is rotated by spring 151 in opposition to thestop 158 which is tilted upon its pivot counterclockwise by spring 151overcoming spring 159. After stop 155 has passed over stop 161, thebellcrank spring 159 immediately projects the bellcrank into the path ofthe next succeeding stop and since spring 151 has exhausted its pressureor power the next stop engages bellcrank 158 and remains in engagementuntil the movement of the hour hand 122 is sufiicient to store enoughenergy in spring 151 to compress the same and again overcome theresistence of spring 159.

This substantially rapid step by step ro tation of disk 150 istranslated into a vocal record. A cone. 165 supported by bracket 166 hasits registering point 167 engage in the groove 154. If desired the disk150 may have the groove 154 engaged by a needle 17 0 carried by an arm171 forming a. part of the diaphragm 172, which diaphragm dischargesthru a horn 173. If desired, the foregomg cone or diaphragm types ofreproducing can be interchanged or substituted, or can be amplified byradio amplification, all of which is well known in the art. Y yTheinvention claimed is: v

j 1. In a clock, a rotating shaft, a rotatable sound reproducing disc, aspring connected at one end to'said shaft and at its other end to saiddisc, a stop, and a spring holdi'n' said {stop in engagement with saiddisc, sai stop sprin overcomeby-tension of said first men- --t10nespring'when the shaft has reached a predetermined position.

:2. In a clock, he combination-of a con stantly rotating shaft, a soundreproducing disc rotatable therewith, ayielding connectiontherebetween,a plurality of sto s upon 0 said disk and equal to-the number 0predetermined intervals, a yielding stop arrangement successivelyengaging the several stops for preventing rotation of the disk by theshaft except at predetermined intervals, said intermittent rotationbeing in amount equal to that between adjacent pairs of stops.

In witness whereof, I have hereunto affixed my signature.

JOHN H'. HOLLOWAY.

